Tesla’s Darkening Outlook to Test Robotaxi Vision Pushed by Musk

Tesla Inc.’s core car-making business is facing a deteriorating outlook, providing a major test of Chief Executive Officer Elon Musk’s ability to lift the stock price with his vision of a self-driving future.

The electric-vehicle maker is expected to post the sharpest drop in revenues in more than a decade when it reports earnings on Wednesday, as demand for Tesla products dries up. And with federal incentives meant to encourage EV sales set to disappear later this year, things are likely to get even more challenging in the coming months.